I would like to mention my impressions of this hotel which was absolutely terrible. My wife and I were looking for a good hotel in Hydra to pass the weekend. We read the relevant (misleading) trip advisor review and we decided that Miranda Hotel was probably one of the best in town. We therefore proceeded and made a reservation paying 85 € in advance for a night with the intention to stay one more night.
When we arrived in the hotel which is located close to the harbor (all the hotels in Hydra are very close to the harbor as the island is very small), the person responsible for the hotel gave us a terrible room. The problems were:
1. The room was too small. The double bed was covering all the space of the room and you could not move around.
2. The ceiling was made out of wood and there was a hole in one of the corners. We were afraid of something (rats, cockroaches etc.) might fall out of there. The hole was large enough that even a large rat could pass through that hole. And moreover, the hole was above our heads when we went to sleep. See the photo!
3. The toilet was not working properly. There was no pressure in the water and you could not properly flash the toilet.
4. The toilet door had fallen off its position and could not be closed.
5. The TV existed but very poor reception (in a few words, useless).
My wife and I were very dissappointed and when we asked politely whether all the rooms were like that, the hotel boss told us that if we wanted to move to another room we should wait until next day and pay more !!!
Anyway we decided to stay for the night (don't forget that we had aldready paid the first night in advance, so the hotel boss "kept us in his pocket") and the next day we fortunately moved out of the room (and the hotel).
The hotel man was offered to move us to another (better room) but he didn't even bother to offer us a discount and compensate for the previous night.
It seems that he preferred to have 2 disappointed customers rather than make something to ease this dissapointment and offer something more.

The thing is that we very easily found another hotel and a far better room which was cheaper !!! (75 €/night).
From this experience we learned the following:
Never pay in advance for something you don't know of.